Problem with loading spatial on Android

Troubleshooting android
1

Hello,I am trying to load spatial on Android Studio.Firstly i am using the codes on https://github.com/iwgeric/jME3-Android-Examples/tree/master/g-Jaime_Demo.
It is working well but textures are not showing.
I am just editing the code on SceneLoadTask.java → *.

Here is my code.

public class SceneLoadTask implements LoadTask{
private SceneLoadData loadData = null;
private static final Logger logger = Logger.getLogger(SceneLoadTask.class.getName());

private final String road=“Scenes/road/road.j3o”;

public SceneLoadData getLoadData() {
    return loadData;
}





@Override
public Object load(Application app) {
    if (loadData != null) {
        throw new IllegalStateException("Scene is already loaded!");
    }

    SceneLoadData loadData = new SceneLoadData();

    BulletAppState bulletAppState = app.getStateManager().getState(BulletAppState.class);
    PhysicsSpace physicsSpace = (bulletAppState != null)? bulletAppState.getPhysicsSpace(): null;
    if (physicsSpace == null) {
        throw new IllegalArgumentException("PhysicsSpace could not be found!");
    }


    loadData.world = (Node)app.getAssetManager().loadModel(road);
    if (loadData.world == null) {
        throw new IllegalArgumentException("worldFileName[" + road + "] did not load.");
    }

  loadData.road = (Spatial) loadData.world.getChild("road");

    if (loadData.road== null) {
        throw new IllegalArgumentException("worldFileName[" + road + "] did not load.");
    }
    loadData.road.setLocalTranslation(-3,-3,0);
    DirectionalLight sun = new DirectionalLight();
    sun.setDirection(new Vector3f(-0.1f, -0.7f, -1.0f));
    loadData.road.addLight(sun);



    return loadData;
}

@Override
public void onDoneLoading(Application app, Object object) {
    SceneLoadData loadData = (SceneLoadData)object;

    BulletAppState bulletAppState = app.getStateManager().getState(BulletAppState.class);
    PhysicsSpace physicsSpace = (bulletAppState != null)? bulletAppState.getPhysicsSpace(): null;
    if (physicsSpace == null) {
        throw new IllegalArgumentException("PhysicsSpace could not be found!");
    }


    if (loadData.world != null) {


        physicsSpace.addAll(loadData.world);
    }


    app.getRenderManager().preloadScene(loadData.getWorld());


    this.loadData = loadData;
}

@Override
public boolean isLoaded() {
    return (loadData != null);
}







public class SceneLoadData {
    private Node world;


    private Spatial road;


    public Node getWorld() { return world; }

    public Spatial getroad() { return road; }

}

}